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Old 10-10-2010, 08:04 AM   #49
sh4z Regular
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Join Date: Mar 2007
Location: Australia
Posts: 413
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Hi Guys,

I have been discussing with a friend of mine about making up a circuit for switching between batteries 9v and 18v.

Essentially the switch will be 4 way with the following options.

1. 2 x 9v in Series - 18v mod.
2. 2 x 9v in Parallel; 9v.
3. 1st Battery 9v.
4. 2nd Battery 9v.

Any ideas

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